A synchronous exception escaping xterm's WriteBuffer loop permanently wedges that terminal: _innerWrite has no try/catch around the parse action or the write-completion callback, the tail re-schedule never runs, and write() only re-arms on an empty buffer. The pane stops rendering and, if a replay was in flight, the replay guard latches and pty-connection's onData silently eats every keystroke — matching the field reports (Discord #performance, issue #2836: content visible, shell alive, daemon output.log flat). Both vectors verified against vendored xterm 6.1.0-beta.287 in xterm-write-buffer-stall.repro.test.ts. Three layers of defense: - Guard every write-completion callback Orca hands xterm at the two choke points (writeForegroundTerminalChunk, writeBackgroundTerminalChunk), with settle and onParsed guarded separately so a WebGL/renderer failure during viewport settle cannot starve the replay-guard release. - Guard all throwing-capable custom parser handlers (DA1, OSC 10/11, CSI ?h/?l mode reports, OSC 52 clipboard, OSC 7 cwd), degrading a throw to "not handled" — same escape class as terminal-link-provider-guard.ts. - Replay-guard watchdog: each engagement releases exactly once, from xterm's completion or a 10s watchdog, so a lost completion (wedged pipeline, disposed-terminal race) cannot latch the guard on a live pane; replayIntoTerminalAsync resolves on either path so restore chains cannot hang. Force-releases record a crash breadcrumb. All guard trips record rate-capped crash breadcrumbs, so the next field occurrence names the throwing stack instead of failing silently. Co-authored-by: Orca <help@stably.ai>
Orca
The AI Orchestrator for 100x builders.
Run Codex, ClaudeCode, OpenCode or Pi side-by-side — each in its own worktree, tracked in one place.
Download Orca
Features
Also in the box:
- Quick open — Search across worktrees, files, agents, commands, and repo context without leaving your flow.
- Account switcher & usage tracking — See Claude and Codex usage and rate-limit resets, and hot-swap accounts without re-logging in.
- Rich repo previews — Preview Markdown, images, PDFs, and repo docs in the workspace.
- Computer Use — Let agents operate desktop apps and visible UI when a workflow needs real interaction.
- Notifications and unread state — Know when an agent finishes or needs attention, then mark threads unread to come back later.
- And many, many more — we ship daily, so this list is perpetually behind. The changelog is the real feature list.
Supported Agents
Works with any CLI agent — if it runs in a terminal, it runs in Orca.
Claude Code
Codex
Grok
Cursor
GitHub Copilot
OpenCode
MiMo Code
Amp
OpenClaude
Antigravity
Pi
oh-my-pi
Hermes Agent
Devin
Goose
Auggie
Autohand Code
Charm
Cline
Codebuff
Command Code
Continue
Droid
Kilocode
Kimi
Kiro
Mistral Vibe
Qwen Code
Rovo Dev
+ any CLI agent
Install
Desktop — macOS, Windows, Linux
- Download from onOrca.dev
- Or grab a build directly: macOS Apple Silicon · macOS Intel · Windows (.exe) · Linux AppImage · All builds
- Running
orca serveon a headless Linux server? See the headless Linux server guide.
Or via a package manager:
# macOS (Homebrew)
brew install --cask stablyai/orca/orca
# Arch Linux (AUR) — or stably-orca-git to build from source
yay -S stably-orca-bin
Mobile Companion — iOS, Android
Pair with your desktop app to monitor and steer your agents from your phone.
- iOS: Download on the App Store or join TestFlight
- Android: Download APK 0.0.18
Community & Support
-
Discord: Join the community on Discord.
-
Twitter / X: Follow @orca_build for updates and announcements.
-
WeChat: Scan the QR code to join the community.
-
Feedback & Ideas: We ship fast. Missing something? Request a new feature.
-
Privacy: See the privacy & telemetry docs for what anonymous usage data Orca collects and how to opt out.
-
Show Support: Star this repo to follow along with our daily ships.
Developing
Want to contribute or run locally? See our CONTRIBUTING.md guide.
License
Orca is free and open source under the MIT License.









